- Code: Select all
+---+---+---+
|..3|...|..2|
|.8.|9..|.7.|
|5..|...|1..|
+---+---+---+
|.6.|4.9|...|
|...|..8|...|
|...|67.|.4.|
+---+---+---+
|..1|...|3..|
|.7.|..4|.8.|
|2..|...|..5|
+---+---+---+ 2 isomorphic grid solutions, UA 60.
This pseudopuzzle with a UA 60 posted after Oceans - and also found by you has an interesting property.
Its not that the the 2 sol. are isomorphic.
Its because almost all of the resultant {+1} puzzles are hard ++
I found large unavoidables in Easter Monster when it came out.
I have often wondered if this was coincidental - or do all the n-1 subpuzzles in hard ++ puzzles tend to have
either
large UA in the solution grid of the hard puzzle
or
high valancy
Despite one of the clues in all of the resulting puzzlesfrom the above pseudopuzzle having valancy 2........ i have a hunch that many or all of the subpuzzles from our hardest puzzles have high valancy and largeish unavoidables.
Perhaps have a look at
- Code: Select all
........6..5..18...9...8.7....8.2.....3.1.2..4..5.3....6.....9...83..1..7.......4 # tarx0075
C
